<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div {
            width: 500px;
            height: 300px;
            /*background: url("../images/图层133.png") repeat;*/

        }
    </style>
</head>
<body>
<div>

</div>
<script>

    // var num1 = 10;
    // var num2 = 20;
    // console.log(num1, num2);
    // var x=0.1;
    // var y=0.2;
    // var sum=x+y;
    // console.log(sum);
    // var str = "&nbspnbspnbspnbspnaasdasdasdasdasdasdasdasdasdasdasdbspnbsp";
    // console.log(str.length);
</script>
</body>
</html>